Hidden Gems in Pre-Owned Solid State Power Amplifiers?


Browse the listings for power amplifiers (e.g. under $5K) and you notice a myriad of Classe, Parasound, Bryston, older McIntosh and Mark Levinson and lots of Pass Labs.
So many in fact that you wonder why.
What are the true audiophile gems in the pre-owned solid state market? Thanks in advance.
avanti1960
Parasound HCA series. John Curl design. Still sounds like magic. From early 90’s and can be had for a bargain. 
Aloia amps. They are 2 pieces (separate the power supply) and sound wonderful. 
Conrad Johnson MF2550SE; 250 wpc, teflon caps, all the good stuff.  Sounds very, very close to the $20,000 to $25,000 tube amps, and are listed on Audiogon now for less than 1/2 of the original retail of $8,000.

Yup, I have had both, and have seller's remorse.
@Ipretiring: I have a Bedini 150/150 and a BEL 1001, among others in my collection. Both still working fine!